Numerical controller

Abstract

A data table stored in a numerical controller associates motors controlled by the numerical controller with information from sensors used by the motors. When the numerical controller is turned on, the contents of the data table are sent from the numerical control section to the motor control section. The motor control section controls each motor by using information from the sensors associated with the motor in the data table.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a numerical controller for controlling a machine tool or the like and, more particularly, to a numerical controller with a novel system configuration of sensors and servo motors that use signals from the sensors.[0003]2. Description of the Related Art[0004]FIG. 1 is a block diagram illustrating the main elements of a system in which a numerical controller controls a machine tool or the like in one conventional mode. The numerical controller (CNC) 10 comprises a numerical control section 11 and a motor control section 12 that controls motors.[0005]Following a machining program or the like, the numerical control section 11 outputs movement commands for individual motors to a motor control section 12. The motor control section 12 uses the commands to perform control functions such as position loop control and velocity loop control, generate pulse width modulation (PWM) signals for rotating ...

AI Technical Summary

Benefits of technology

The present invention is a numerical controller that allows for the use of signals from multiple sensors to control servo motors. The controller includes a numerical control section that outputs movement commands and a motor control section that controls motors based on the movement commands. The controller also has interface units that receive signals from sensors and a data table that stores correspondences between sensors and motors. This allows for easy control of motors based on signals from sensors. The invention provides a flexible and efficient way to control servo motors using multiple sensors.

Problems solved by technology

. . is fixed and unchangeable.

When a movable table or another part of a machine tool must move at high speed or the machine tool is large, a large torque is required.

The system in FIG. 2 allows the associations between servo motors and sensors to be changed, but does not allow signals from a plurality of sensors to be used by a single servo motor, nor does it permit signals from a single sensor to be used by a plurality of servo motors.

Therefore, signals from sensors used by other servo amplifiers cannot be used directly.

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